How much fiber is in cucumber?
Cucumber has 0.3 grams of fiber in 1/2 cup, sliced (52 grams), according to USDA FoodData Central. That is 1% of the Daily Value, below the 10% the FDA requires before a label can call a food a good source of fiber. Per 100 grams, cucumber has 0.5 grams of fiber.
0.3gof fiber in 1/2 cup, sliced
1% of a 25 gram day
Fiber in cucumber by serving size
| Serving | Weight | Fiber |
|---|---|---|
| 0.5 cup slices | 52g | 0.3g |
| 1 cucumber (8-1/4") | 301g | 1.5g |
| 100 grams | 100g | 0.5g |
How cucumber compares with other vegetables
Cucumber ranks 13 of 13 vegetables in this library, by fiber in one serving.
Each bar is one serving: tomato, 1 medium tomato; kale, 1 cup, raw; spinach, 1 cup, raw; celery, 1 medium stalk; cucumber, 1/2 cup, sliced.
Close to zero
Half a cup of sliced cucumber with the peel has 0.3 grams of fiber. Cucumber is 0.5 grams per 100 grams.
Fine in a salad, not a fiber source
A whole cup of slices is 0.6 grams. Half a cup of chickpeas in the same salad adds 6.3.
More fiber alongside cucumber
- Chickpeas: 12.5 grams in 1 cup, cooked
- Quinoa: 5.2 grams in 1 cup, cooked
- Lentils: 15.6 grams in 1 cup, cooked
Not sure what your daily number should be? The fiber calculator works it out from your age and sex.
Questions about fiber in cucumber
- How much fiber is in cucumber?
- Cucumber has 0.3 grams of fiber in 1/2 cup, sliced, which weighs 52 grams. The number comes from USDA FoodData Central.
- Is cucumber high in fiber?
- One serving, 1/2 cup, sliced, has 0.3 grams. That is 1% of the Daily Value, below the 10% the FDA requires before a label can call a food a good source of fiber. Cucumber ranks 13 of 13 vegetables in this library by fiber per serving.
- How much fiber is in 100 grams of cucumber?
- 0.5 grams of fiber per 100 grams. The largest size USDA lists, 1 cucumber (8-1/4"), weighs 301 grams and has 1.5 grams of fiber.
- How many half-cups of cucumber would it take to reach 25 grams of fiber?
- About 83.4, at 0.3 grams each. Most people reach 25 grams by mixing several foods across the day.
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Source: USDA FoodData Central, Cucumber, with peel, raw, retrieved October 8, 2026. Label terms follow the FDA's 28 gram Daily Value for fiber.